UrbanSound8K[1]} is used in our experiments.
It is comprised of 8732 sound clips of up to 4 seconds in duration
taken from the field recordings. The clips span ten environmental sound classes: air conditioner, car horn, children playing, dog bark, drilling, engine idling, gun shot, jackhammer, siren, and street music.
Also, each sound clip is assigned a subjective salience label in order to indicate a given sound is a foreground (salience=1) or background one (salience=2). This is an interesting attribute particularly for environmental sound analysis. Common audio name labels does not deliver enough information to determine if the sound is foreground or background. For example, `Siren' sounds could be considered either background sound (e.g., an ambulance is going by in a distant location while a dog is barking) or a foreground sound (e.g., the sound clip is about an ambulance sound recorded directly). We found that the background sounds are good candidates that include environmental sounds (e.g., background air conditioner working sound or background street music) while the foreground sounds are good content sounds (e.g., drilling or gun shot sounds in the foreground) to which the environment sounds are transferred. We summarize related statistics in Table REF .
